Brush



i March 24, 1925.

1,530,753 J. o. CARREY Filed NOV. 10, 1921 Patented Mar. 24, 1925.

PATENT oFFxcE.

JOHN O. CARREY, GF STpLOUIS, MISSOURI.

BRUSH.

Application ined Novemberio, 192,1.

To all whom t vmay concern.

Be it known that I, JOHN O. CAnRnY, a citizen of the United States,residing at St. Louis, Missouri, have invented `a certain new and usefulImprovement in Brushes, of which the following is a full, clear, andexact description, such as will enable others skilled in the art towhich it appertains to make and use the same, reference being had to theaccompanying drawings, forming partof'this application. y

This invention relates to a new and useful improvement in brushes, andthe objects of the invention are to provide a brush having bristleswhich can be readily compacted so to facilitate their insertion into therecesses and cavities of machine parts de sired to be cleaned, such asspark plugs.

Other objects of the invention are to provide manually operable meansfor compacting` the ends of the bristles of the brush, said means beingoperable to release said bristles so that the latter can assume theiroperative positions.

lllith these and other objects in View my invention consists in certainnovel features of construction and arrangements of parte hereinaftermore fully described and claimed and illustrated in the accompanyingdrawings in which,-

Figure 1 is a perspective view of the brush.

Figure 2 is a side elevation thereof.

Figure 8 is a similar view showing the bristles compacted and ready tobe inserted in position.

Figure 11 is a View looking against the underside of the brush.

Figure 5 shows a modied form of brush.

Figure 6 is a plan view of the lower end of the modified form of brush.

Referring by numerals to the accompanying drawings, 10 designates theback o'f the brush in which are seated in the usual manner tufts ofbristles or wire members 11. Bristles or wire members 12 are seated inone end of said brush and are spaced a suitable distance from thebristles 11. Encircling said bristles 12 is the lower loop end 18 ofwire 14 which extends upwardly through an aperture 15 formed in the backor handle 10. The upper end 16 of this wire is bent at right anglesthereto and projects longitudinally beyond the end of said brush. Thisend is preferably flattened or stamped to assume the desired thickness,

serial No. 514,224.

whereupon it can be used in gauging the proper distance between the endsof the spark plugelectrodes. The outwardly projecting end 16 forms ahandle by means of which wire 1li may be properly manipulated and at thesame time prevents withdrawal of said wire from its seat in the back 10.rThe lower end 18 is also llattened, only in thiscase, the flat wallsare disposed vertically in order to engage bristles 12. The loop formedby this end is shaped so vas to conform to the curvature of the wall ofthe spark plug in order to properly assemble the ends of the bristles 12and enable the easy insertion thereof in the lower end of the sparkplug.

ln using the brush for cleaning a foul spark plug, the operator presseson handle 16, thereby depressing the wire 14C and'causing` its lowerloop end 13 to compact or press together the lower ends of bristles 12.rl`he compacted ends of bristles 12 are positioned in the spark plug`and the brush is pressed against the same so that bristles 12 are movedinto the spark plug cavity, while wire 14, by virtue of the fact thatits loop end 13 bears against the edge of the spark plug, is movedoutwardly through aperture 1.5 to its extreme outer position( The plugor brush, as the case may be, is then manipulated so as to causebristles 12 to move over the inner walls of the plug thereby looseningand removing carbon therefrom.

In the modified form shown in Figures 5 and 6, brush 17 is provided withan upwardly extending rod 18, which is slidably received in tubularmember 19. The lower end 20 of this tubular member is so shaped as to `Q;ive the bristles 21 of brush 17 the required form. By pressing onbutton 22 fixed to the upper end of rod 18, brush 17 is caused to movedownwardly, and bristles 21 move outwardly from the lower end 20 of rod18 into operative position. Bristles 11 are used for cleaning purposesin the usual manner. By using wire 14:, bristles 12 can be easily andquickly confined within a limited space, and by properly shapingr thelooped end 13, the ends of the bristles can be given any desired shapein order to facilitate their positioning in the cavity desired to becleaned.

When member 14 is moved upwardly, loop 15 will have a tendency to forcethe ends of bristles 12 outwardly into operative position.

A brushiconstruoted according to .-my invention issimpleiniconstruction, inexpensive to manufacture, and can be used as anordinary brush or for cleaning the inner Walls of spark plugs or gaugingthe distance between the. ends of electrodes.

Obviously, Various minor changes in the form and construction of` myimproved brush can be made and substituted for those herein shownWithout departing from the spiriti i of any invention.`

What Iclaiin is:

l. Infcombina'tion with a brush back havin gg bristles, .of ta :membermoi/ably mounted through the handle of said brush, and having asemi-.circularband portion encircling; and compressing said bristles thearea of saidiband beingkless-than the base-of said bristles.` wherebyWhen said member is moved. to position saidv band portion adjacent tothelbase of'saidbrstles thelatter'are distorted so as to cause the freebristles the area of said bridle being lessv than the. base ofsaidbiistleswvheieby when said member gis movedin onerdirection'the bridlethereof compresses and shapes the free ends of said bristles and Whensaid member is moved in the opposite direction said bridle compressesthe base portions of said bristles thereby distorting said bristles andexpandingthej free ends.thereof.

8. In combination with a spark plug' brush back having bristles, a.member f slidably mounted through said brush back yadjacent to saidbristles, said member being provided.

at its lower end with a semibircular loop portion for encircling andshaping, said bristles and'at its upper-end with a laterali extensionadapted to bev used in gauging tliesparlr gap oftheplugelectrodes, thearea ofsaid loop being; less than the base of said bristles. wherebyWhensaid loop is moved adjacent the-free ends'ofy said bristles thelatterpare compressed and shaped to facilitate theirinsertion inthespark plug and When said loopis moved toward" the base; of thebristlesthe. latter are stressed causing the free'ends thereof toexpand.

ln testimony. whereof IA hereuntoaftix imysignature this 2nd dayofl\lo\r1mber, 1921.Y

JoHN- o. oARRnJY.

